CN104607038B - A kind of production technology of dedusting denitrification integral equipment and its part - Google Patents

Abstract

The invention discloses an integrated device for dust removal and denitrification, which comprises a clean gas chamber, a reaction chamber, a flue gas inlet, an ash collecting hopper, a bracket, an ash unloader, a clean gas outlet, a compressed air inlet, a partition, and a catalyst filter assembly , the bottom of the reaction chamber is provided with a flue gas inlet; the top of the clean gas chamber opposite to the flue gas inlet is provided with a clean gas outlet, and the clean gas chamber is also provided with a compressed air inlet; a dust collecting bucket is arranged under the reaction chamber; in the reaction chamber A plurality of catalyst filter assemblies are arranged, and the plurality of catalyst filter assemblies are arranged in a matrix, and the catalyst filter assembly is provided with at least one layer; the catalyst filter assembly includes a filter upper cover and a filter unit. A production process for preparing the above-mentioned catalyst filter assembly, including the preparation of a filter unit. The preparation of the filter unit includes the following steps: extrusion molding, drying, sintering, soaking, and drying. The invention is a mature, efficient and implementable equipment and production process.

Description

A production process of dust removal and denitrification integrated equipment and its components

technical field

The invention relates to an industrial waste gas purification equipment, in particular to a high-temperature ceramic filter combined with a catalyst to purify industrial waste gas integrated dust removal and denitrification equipment and a production process of its components.

Background technique

my country's energy is mainly coal-fired, and the flue gas contains a large amount of sulfur dioxide and nitrogen oxides. Direct emission will cause serious pollution to the atmosphere and affect the health of the society. The urgent problem to be solved in the world is the urgent task of protecting the environment and benefiting mankind. At present, most of the equipment used for flue gas desulfurization and denitrification are developed independently, forming their own technical systems and process flows. There are more than 50 kinds of flue gas denitrification processes at home and abroad, which are divided into two types: wet method and dry method. Wet denitration methods include acid absorption method, alkali absorption method, oxidation absorption method, complex salt absorption method, etc. Dry denitrification methods include SCR, SNCR, adsorption method, plasma activation method, etc.

The wet flue gas denitrification technology in the prior art is complicated, the equipment is bulky, difficult to build, the operating cost is high, and it is easy to cause secondary pollution; the dry flue gas denitrification technology has low construction investment, simple process equipment, low operating cost, and is not easy to cause secondary pollution. Secondary pollution, SCR, SNCR and SNCR-SCR joint technology are widely used. However, SNCR requires high-temperature reaction (900-1200°C), large consumption of reactants/medium and ammonia escape, low NOx removal efficiency, and corrosion and blockage of ammonium sulfite [(NH4)2SO4] and ammonium sulfate (NH4HSO4) generated equipment.

SCR is currently the most mature technology and the most widely used denitrification technology in the world. At present, for the nitric acid tail gas produced by large-scale nitric acid production lines in domestic and foreign chemical companies, SCR reactors are directly installed in the tail gas discharge system to implement denitrification pollution control, but it has a great impact on the total amount of smoke and dust emissions and regional ambient air quality.

The denitrification function of CATCERA (high temperature ceramic filter) technology is far superior to the current denitrification technology at home and abroad. It is currently the world's leading denitrification technology. It overcomes the shortcomings of other denitrification technologies such as large area and large system resistance. The catalyst can be used for 5- 8 years, and can be reused after cleaning and soaking. The technology has the advantages of reliable performance, low operating cost and long service life. The efficiency reaches more than 90%, and it is resistant to high temperature, wear and corrosion. However, the high-temperature ceramic filter technology is still in its infancy, the production process and purification equipment are not yet perfect, and there are still many problems. In view of the above problems, it is necessary to provide a production process of dust removal and denitrification integrated equipment and its components.

Contents of the invention

The purpose of the present invention is to provide a production process of integrated dust removal and denitrification equipment and its components. The production process of the integrated dust removal and denitrification equipment and its components is a mature, efficient and implementable equipment and production process.

The technical solution adopted by the present invention to solve the technical problem is: an integrated equipment for dust removal and denitrification, including a clean gas chamber 1, a reaction chamber 2, a flue gas inlet 3, an ash collecting bucket 4, a bracket 5, an ash unloader 6, a clean Gas outlet 7, compressed air inlet 8, partition 9, catalyst filter assembly 10, a closed space is set on the upper part of the bracket 5, the closed space includes the lower reaction chamber 2 and the upper clean air chamber 1, the reaction chamber 2 and the clean air chamber The chamber 1 is separated by a partition 9; the bottom of the reaction chamber 2 is provided with a flue gas inlet 3; the top of the clean gas chamber 1 opposite to the flue gas inlet 3 is provided with a clean gas outlet 7, and the clean gas chamber 1 is also provided with a compressed air inlet 8. An ash collecting hopper 4 is arranged below the reaction chamber 2, and the ash collecting hopper 4 is a conical funnel; an ash unloader 6 is arranged at the outlet of the bottom of the ash collecting hopper 4; the reaction chamber 2 is provided with a plurality of Catalyst filter assembly 10, a plurality of catalyst filter assemblies 10 are arranged in a matrix, and at least one layer of catalyst filter assembly 10 is provided; catalyst filter assembly 10 includes a filter upper cover 10-1, a filter unit 10 -2, a plurality of filter units 10-2 are neatly arranged and combined into one body through the filter upper cover 10-1.

As an optimization, the pressure of the compressed air passing through the compressed air inlet 8 is 0.3-0.8 MPA.

As an optimization, at least one hollow filter element is arranged inside the filter unit 10-2, and the cross-sectional shape of the hollow filter element is any one of a rectangle, a rectangle with rounded corners, a circle, and an ellipse or several.

As an optimization, the filter unit 10-2 is a cuboid with a length of 500-3000 mm, a width of 100-500 mm, and a thickness of 25-60 mm.

As an optimization, the partition 9 is a metal or non-metallic plate; a plurality of holes are arranged on the partition 9, and are made by cutting, blanking or pouring; the holes on the partition 9 are connected with the filter unit 10-2 The shape and size of the cross section of the internal hollow filter unit are the same.

As an optimization, the preparation materials of the filter unit 10-2 include quartz sand, pottery clay, and charcoal powder.

A production process for preparing the above-mentioned catalyst filter assembly 10, including the preparation of the filter unit 10-2, the assembly of the filter upper cover 10-1 and the filter unit 10-2, wherein the filter unit 10-2 Preparation includes the following steps:

A. Extrusion molding, mix quartz sand, pottery clay, and charcoal powder in a certain proportion and put them into the mud mixer, add adhesive and water, and then turn on the mud mixer; after the above materials are mixed evenly, put them into the mud mixer for processing; Add the processed mixed material to the extruder; the extruder extrudes to form a blank of the required shape, and cuts the required length;

B, drying, put the blank obtained in the previous step into the drying chamber for drying;

C, sintering, sintering the blank dried in the previous step to 650 degrees and air cooling after firing for a certain period of time;

D. Remove the floating dust on the surface of the cooled blank with compressed air, put it into the catalyst solution, soak and saturate it, and then dry it.

As an optimization, the soaking time of the blank in the catalyst solution is 3-10 days.

As an optimization, the catalyst solution contains nanoscale titanium oxide and aluminum oxide.

As an optimization, the molecular weight ratio of titanium oxide and aluminum oxide in the catalyst solution is 0.1-10.

The beneficial effects of the present invention are: compared with the prior art, the production process of the dust removal and denitrification integrated equipment and its components of the present invention is determined after many tests and improvements, and is a mature, efficient, implementable equipment and Production Process.

Description of drawings

Fig. 1 is the general structural diagram of the present invention.

Fig. 2 is a top view of the catalyst filter assembly, the main part of the present invention.

Fig. 3 is an overall view of the catalyst filter assembly, the main part of the present invention.

Figure 4 is a top view of the partition.

Fig. 5 is a front view of the filter unit.

Fig. 6 is a top view of the filter unit.

Among them, 1 clean air chamber, 2 reaction chamber, 3 flue gas inlet, 4 ash collecting hopper, 5 bracket, 6 ash unloader, 7 clean gas outlet, 8 compressed air inlet, 9 clapboard, 10 catalyst filter assembly, 10-1 filter upper cover, 10-2 filter unit.

detailed description

As shown in Figure 1, an integrated dust removal and denitrification equipment includes a clean gas chamber 1, a reaction chamber 2, a flue gas inlet 3, an ash collecting bucket 4, a bracket 5, an ash unloader 6, a clean gas outlet 7, and a compressed air inlet 8. Partition plate 9, catalyst filter assembly 10, a closed space is set on the upper part of the support 5, the closed space includes the lower reaction chamber 2 and the upper clean gas chamber 1, and the reaction chamber 2 and the clean gas chamber 1 are separated by the partition plate 9. Open; the bottom of the reaction chamber 2 is provided with a flue gas inlet 3; the top of the clean gas chamber 1 opposite to the flue gas inlet 3 is provided with a clean gas outlet 7, and the clean gas chamber 1 is also provided with a compressed air inlet 8; under the reaction chamber 2 An ash collecting hopper 4 is provided, and the ash collecting hopper 4 is a conical funnel; an ash unloader 6 is arranged at the outlet of the bottom of the ash collecting hopper 4; a plurality of catalyst filter assemblies 10 are arranged in the reaction chamber 2, A plurality of catalyst filter assemblies 10 are arranged in a matrix, and the catalyst filter assemblies 10 are provided with at least one layer; In the unit 10-2, a plurality of filter units 10-2 are neatly arranged and combined into one body through the filter upper cover 10-1.

In the embodiment shown in Fig. 5 and Fig. 6, two hollow cavities are arranged inside the filter unit 10-2, and the cross-sectional shape of the hollow cavities is rectangular. The filter unit 10-2 is a cuboid with a length of 500-3000 mm, a width of 100-500 mm, and a thickness of 25-60 mm.

As shown in Figure 4, the partition 9 is a metal plate, and a plurality of holes are arranged on the partition 9, which is made by cutting, punching or pouring; the holes on the partition 9 are connected with the hollow filter unit 10-2 inside The shape and size of the cross-section of the monomers are the same.

A production process for preparing the catalyst filter assembly 10, including the preparation of the filter unit 10-2, the assembly of the filter upper cover 10-1 and the filter unit 10-2, wherein the preparation of the filter unit 10-2 Include the following steps:

A. Extrusion molding, mix quartz sand, pottery clay, and charcoal powder in a certain proportion and put them into the mud mixer, add adhesive and water, and then turn on the mud mixer; after the above materials are mixed evenly, put them into the mud mixer for processing; Add the processed mixed material to the extruder; the extruder extrudes to form a blank of the required shape, and cuts the required length;

B, drying, put the blank obtained in the previous step into the drying chamber for drying;

C, sintering, sintering the blank dried in the previous step to 650 degrees and air cooling after firing for a certain period of time;

D. Remove the floating dust on the surface of the cooled blank with compressed air, put it into the catalyst solution, soak and saturate it, and then dry it.

The soaking time of the blank in the catalyst solution is 3-10 days. The catalyst solution contains nanometer titanium oxide and aluminum oxide. The molecular weight ratio of titanium oxide and aluminum oxide in the catalyst solution is 0.1-10.

The above specific embodiments are only specific cases of the present invention. The scope of patent protection of the present invention includes but not limited to the product form and style of the above specific embodiments, any integrated dust removal and denitrification equipment and its components that meet the claims of the present invention The production process and any appropriate changes or modifications made by those skilled in the art shall fall within the scope of patent protection of the present invention.

Claims (4)

1. a kind of dedusting denitrification integral equipment, including air-purifying chamber（1）, reative cell（2）, gas approach（3）, flue-dust retainer（4）, branch Frame（5）, discharge apparatus（6）, the outlet of net gas（7）, compressed air inlet（8）, dividing plate（9）, catalyst filter assembly（10）, support （5）Top sets a confined space, and confined space includes the reative cell of bottom（2）With the air-purifying chamber on top（1）, reative cell（2） With air-purifying chamber（1）Pass through dividing plate（9）Separate；Reative cell（2）Bottom is provided with gas approach（3）；Air-purifying chamber（1）With gas approach （3）Net gas outlet is provided with the top of opposite side（7）, air-purifying chamber（1）It is additionally provided with compressed air inlet（8）；In reative cell（2） Lower section is provided with flue-dust retainer（4）, flue-dust retainer（4）For a conical hopper；In flue-dust retainer（4）Discharge apparatus are provided with outlet at bottom （6）；It is characterized in that：Described reative cell（2）In be provided with multiple catalyst filter assemblies（10）, multiple catalyst filtrations Device assembly（10）Into matrix arrangement, catalyst filter assembly（10）At least provided with one layer；Catalyst filter assembly（10）Bag Include and covered on filter（10-1）, filter unit（10-2）, multiple filter units（10-2）Proper alignment simultaneously passes through filtering Covered on device（10-1）It is combined into one, catalyst filter assembly（10）Production technology include filter unit（10-2）'s Covered in preparation, filter（10-1）With filter unit（10-2）Assembling, wherein filter unit（10-2）Preparation bag Include following steps：

A, extrusion forming, are put into tug mill after quartz sand, clay, charcoal powder are mixed by a certain percentage, add after adhesive, water Open tug mill；Pug mill processing is put into after above-mentioned material is well mixed；The mixing material addition extruder completed will be handled； The blank of shape needed for extruder is extruded into, length needed for interception；

B, drying, are put into drying chamber by the blank obtained in upper step and are dried；

C, sintering, the blank after upper step is dried sinter to 650 degree and fire air cooling after certain time；

D, by the blank after cooling with compressed air remove surface floating dust after be put into catalyst solution soak saturation after dry.

2. a kind of dedusting denitrification integral equipment according to claim 1, it is characterised in that：Described blank is in catalyst The time soaked in solution is 3~10 days.

3. a kind of dedusting denitrification integral equipment according to claim 1 or 2, it is characterised in that：Described catalyst is molten Include nano size Titania, aluminum oxide in liquid.

4. a kind of dedusting denitrification integral equipment according to claim 3, it is characterised in that：In described catalyst solution The molecular weight ratio of titanium oxide and aluminum oxide is 0.1~10.